Started my 2006 XLR-V yesterday and it made a very loud grinding noise that lasted 6-7 seconds and then disappeared. Turned it off and tried again....same result. Called the dealer and got the usual response: have it towed in & they will fix. No hint as to what may have been causing the noise. Engine idled fine & ran OK.

Anyone seen/heard of this before?

Thanks,
Lomac06